using UnityEngine;

namespace BaseGames.Player.States
{
    /// <summary>跑步状态。播放 Run 动画并驱动水平移动。</summary>
    public class RunState : PlayerStateBase
    {
        public RunState(PlayerController owner) : base(owner) { }

        public override void OnStateEnter()
        {
            if (AnimCfg?.Run != null)
                Anim.Play(AnimCfg.Run);
            // 落地时重置空中能力计数器（绝大多数情况被 IdleState 覆盖，但水平落地直接进入 RunState 时也需要）
            Owner.ResetAirJumps();
            Owner.GetState<DashState>()?.ResetAirDash();
            Owner.GetState<WallSlideState>()?.ResetWallGrab();
        }

        public override void OnStateUpdate()
        {
            if (!Move.IsGrounded)
            {
                _owner.TransitionTo(_owner.GetState<FallState>());
                return;
            }
            if (Buffer.ConsumeJump())
            {
                _owner.TransitionTo(_owner.GetState<JumpState>());
                return;
            }
            // 地面攻击：Move Y > 0 → 上劈；其余 → 普通连击
            if (Buffer.ConsumeAttack())
            {
                if (Input.MoveInput.y > 0.5f)
                    _owner.TransitionTo(_owner.GetState<UpAttackState>());
                else
                    _owner.TransitionTo(_owner.GetState<AttackState>());
                return;
            }
            // 地面冲刺：先确认能力与冷却均满足，再消耗缓冲，避免无操作时静默吃掉输入
            var ds = Owner.GetState<DashState>();
            if (ds != null && ds.CanDash
                && Stats != null && Stats.HasAbility(AbilityType.Dash)
                && Buffer.ConsumeDash())
            {
                _owner.TransitionTo(ds);
                return;
            }
            if (Mathf.Abs(Input.MoveInput.x) < 0.1f)
            {
                Move.ZeroHorizontalVelocity();
                _owner.TransitionTo(_owner.GetState<IdleState>());
                return;
            }
        }

        public override void OnStateFixedUpdate()
        {
            // 离地检测（与 CheckGrounded 同帧在 FixedUpdate 中执行，立即响应离地事件）
            if (!Move.IsGrounded)
            {
                _owner.TransitionTo(_owner.GetState<FallState>());
                return;
            }

            float inputX = Input.MoveInput.x;
            if (Mathf.Abs(inputX) > 0.1f)
                Move.Move(inputX * Cfg.RunSpeed);
            else
                Move.ZeroHorizontalVelocity();
        }
    }
}